What Happens During the Final Weeks After How To Quit A Job?

After deciding How To Quit A Job, I’m curious about what usually happens during the notice period or final working weeks. Some people say they continue working normally, while others mention reduced responsibilities or handing over tasks. I’m not sure what behavior is expected from employees during this stage. What was your experience like during your final weeks at a job? I’d like to understand how to stay productive and professional until the very last working day.